阅读说明：本技术 一种腈纶纤维匀染剂及其制备方法 (Acrylic fiber leveling agent and preparation method thereof ) 是由 周巧燕 麦国耀 麦理恒 麦信恒 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种腈纶纤维匀染剂,按质量百分比计算,包括以下成分：乳化剂1.0％-2.0％、脂肪胺及其衍生物3.0％-5.0％、脂肪醇类1.0％-3.0％、吡啶及其衍生物5.0％-36.0％、苄基化合物8.0％-48.0％、水6.0％-82.0％。本发明采用上述成分的一种腈纶纤维匀染剂,具有很好的扩散性和迁移性,从而染色时的染料分子很均匀的与纤维分子结合,减少了色差,保证了染色的光泽度和色牢度,符合了环保要求。(The invention discloses an acrylic fiber leveling agent, which comprises the following components in percentage by mass: 1.0-2.0% of emulsifier, 3.0-5.0% of fatty amine and derivatives thereof, 1.0-3.0% of fatty alcohols, 5.0-36.0% of pyridine and derivatives thereof, 8.0-48.0% of benzyl compounds and 6.0-82.0% of water. The acrylic fiber leveling agent adopting the components has good diffusivity and mobility, so that dye molecules are uniformly combined with fiber molecules during dyeing, the color difference is reduced, the glossiness and the color fastness of dyeing are ensured, and the environment-friendly requirement is met.)

1. The acrylic fiber leveling agent is characterized by comprising the following components in percentage by mass: 1.0-2.0% of emulsifier, 3.0-5.0% of fatty amine and derivatives thereof, 1.0-3.0% of fatty alcohols, 5.0-36.0% of pyridine and derivatives thereof, 8.0-48.0% of benzyl compounds and 6.0-82.0% of water.

2. The acrylic fiber leveling agent according to claim 1, wherein: the emulsifier is one or more of fatty alcohol ethers (AEO3-10), isomeric tridecanol polyoxyethylene ethers (3-9), oleyl alcohol polyoxyethylene ethers (OE), castor oil polyoxyethylene Ethers (EL), sorbitan fatty esters (Span), polyoxyethylene sorbitan stearates (Tween) and glyceryl monostearate.

3. The acrylic fiber leveling agent according to claim 1, wherein: the fatty alcohol is one or more of glycerol, polyethylene glycol (PEG) and diethylene glycol.

4. The acrylic fiber leveling agent according to claim 1, wherein: the pyridine and the derivatives thereof are one or more of picoline, ethylpyridine, pure pyridine and the derivatives thereof.

5. The acrylic fiber leveling agent according to claim 1, wherein: the benzyl compound is one or more of benzyltriethylammonium chloride, benzylammonium chloride and benzyl chloride.

6. The acrylic fiber leveling agent according to claim 1, wherein: the fatty amine and the derivatives thereof are one or a mixture of two of fatty amine polyoxyethylene ether 10 and fatty amine polyoxyethylene ether 15.

7. A method for preparing an acrylic fiber leveling agent as claimed in any one of claims 1 to 6, comprising the steps of:

(1) in a vacuum reaction kettle with a reflux cooler, firstly adding water in a formula into the reaction kettle, starting up and stirring, then sequentially adding pyridine and derivatives thereof, benzyl compounds, fatty amine and derivatives thereof, automatically heating to 90-110 ℃ for reaction, carrying out vacuum heat preservation reaction for 3 hours, and detecting the quality of a product;

(2) and (2) cooling the product obtained in the step (1) to 50 ℃, adding an emulsifier for reaction for 2 hours, sequentially adding fatty alcohol, mixing for reaction for 1 hour, and standing for later use.

8. The preparation method of the acrylic fiber leveling agent according to claim 7, characterized in that: the stirring speed in the step (1) is 100 rpm.

9. The preparation method of the acrylic fiber leveling agent according to claim 7, characterized in that: the reaction temperature in the step (1) is increased to 55-60 ℃ from normal temperature, when the temperature reaches 55-60 ℃, the reaction temperature is increased, the temperature is increased to 75-80 ℃ in 17-20 minutes, 5 minutes is needed from 80-110 ℃, and then reflux condensate water is started to control the reaction.

Technical Field

The invention relates to the technical field of acrylic fiber leveling agents, in particular to an acrylic fiber leveling agent and a preparation method thereof.

Background

The acrylic fiber leveling agent on the market at present has the advantages that the production raw materials do not meet the environmental protection requirements of European Union and the like, substances harmful to the environment and human beings are contained, although some substances can meet the environmental protection requirements, the leveling effect is poor, the dyeing is easy, the requirements of finished products cannot be met, defective products appear in the finished products, the cost is high, the acrylic fiber leveling agent is an important textile auxiliary agent indispensable to the textile industry, along with the improvement of the living standard, people pursue comfort and color diversification when wearing the acrylic fiber leveling agent, the cloth with diversified colors must be dyed to achieve the purpose, the leveling agent must be used in the dyeing process to achieve uniform colors, the colors and the required colors cannot be dyed, and therefore the leveling agent with high quality, low price and environmental protection has development prospects in domestic and foreign markets. In view of the above, it is necessary to design a leveling agent for acrylic fibers.

Disclosure of Invention

The invention aims to provide an acrylic fiber leveling agent and a preparation method thereof, which have good diffusivity and mobility, so that dye molecules during dyeing are uniformly combined with fiber molecules, the color difference is reduced, the glossiness and color fastness of dyeing are ensured, and the environmental protection requirement is met.

In order to realize the aim, the invention provides an acrylic fiber leveling agent which comprises the following components in percentage by mass: 1.0-2.0% of emulsifier, 3.0-5.0% of fatty amine and derivatives thereof, 1.0-3.0% of fatty alcohols, 5.0-36.0% of pyridine and derivatives thereof, 8.0-48.0% of benzyl compounds and 6.0-82.0% of water.

Preferably, the emulsifier is one or more of fatty alcohol ethers (AEO3-10), isomeric tridecanol polyoxyethylene ethers (3-9), oleyl alcohol polyoxyethylene ethers (OE), castor oil polyoxyethylene Ethers (EL), sorbitan fatty esters (Span), polyoxyethylene sorbitan stearates (Tween), and glyceryl monostearate.

Preferably, the fatty alcohol is one or more of glycerol, polyethylene glycol (PEG) and diethylene glycol.

Preferably, the pyridine and its derivatives are one or more of picoline, ethylpyridine, pure pyridine and its derivatives.

Preferably, the benzyl compound is one or more of benzyltriethylammonium chloride, benzylammonium chloride and benzyl chloride.

Preferably, the fatty amine and the derivative thereof are one or a mixture of two of fatty amine polyoxyethylene ether 10 and fatty amine polyoxyethylene ether 15.

A preparation method of an acrylic fiber leveling agent comprises the following steps:

(1) in a vacuum reaction kettle with a reflux cooler, firstly adding water in a formula into the reaction kettle, starting up and stirring, then sequentially adding pyridine and derivatives thereof, benzyl compounds, fatty amine and derivatives thereof, automatically heating to 90-110 ℃ for reaction, carrying out vacuum heat preservation reaction for 3 hours, and detecting the quality of a product;

(2) and (2) cooling the product obtained in the step (1) to 50 ℃, adding an emulsifier for reaction for 2 hours, sequentially adding fatty alcohol, mixing for reaction for 1 hour, and standing for later use.

Preferably, the stirring speed in the step (1) is 100 rpm.

Preferably, the reaction temperature in the step (1) is increased from normal temperature to 55-60 ℃, when the temperature reaches 55-60 ℃, the reaction temperature is increased, the temperature is increased to 75-80 ℃ in 17-20 minutes, 5 minutes is needed from 80-110 ℃, and then reflux condensed water is started to control the reaction.

The reaction principle is as follows: the following two reactions are carried out simultaneously in one system.

(1) In the aqueous solution, the fatty amine derivative and a benzyl compound slowly carry out quaternary ammonium reaction at normal temperature, the temperature is gradually increased along with the continuous reaction, the temperature is increased from normal temperature to 55-60 ℃ in about 70 minutes (60 minutes in hot days) in winter, the reaction temperature is rapidly increased when the temperature reaches 55-60 ℃, the temperature is increased to 75-80 ℃ in about 17-20 minutes, 5 minutes is needed from 80-110 ℃, at this time, reflux condensate water is required to control the reaction, and otherwise, the reaction is subjected to bumping. The quaternary ammonium reaction requires a constant temperature of 90-100 ℃ for 3 hours. The speed of the reaction temperature rise is changed with the different dosage of the fatty amine and the benzyl compound in the formula, if the dosage of the fatty amine and the benzyl compound is increased, the reaction speed is faster, and the temperature rise speed is also faster.

(2) In the water solution, pyridine and benzyl compound are subjected to C-N coupling reaction slowly at normal temperature, the temperature is increased gradually along with the continuous reaction, the temperature is increased from normal temperature to 55-60 ℃ in about 70 minutes (60 minutes in hot days) in winter, the reaction temperature is increased rapidly when the temperature reaches 55-60 ℃, the temperature is increased to 75-80 ℃ in about 17-20 minutes, 5 minutes is needed from 80-110 ℃, and reflux condensate water is required to control the reaction, otherwise the reaction is subjected to bumping. The C-N coupling reaction requires a constant temperature of 90-100 ℃ for 3 hours. The speed of the reaction temperature rise is changed with the different use amounts of the pyridine and the benzyl compound in the formula, if the use amounts of the pyridine and the benzyl compound are increased, the reaction speed is higher, and the temperature rise speed is higher.

The raw material adding function and function are as follows:

(1) when the temperature of the system is reduced to 50 ℃, the emulsifier is slowly added and stirred for 120 minutes to emulsify the two systems of C-N coupling \ quaternary ammonium salt into more stable golden yellow transparent emulsion, and at the moment, the C-N coupling \ quaternary ammonium salt generates special advantage that the cationic dye molecules and the acrylic fiber molecules have excellent uniform permeation diffusion coloring effect, cross linking and end bonding, uniform adsorption and condensation and are slowly and uniformly combined in the fiber molecules.

(2) The addition of fatty alcohol makes the system have better permeation and wetting functions, and cationic dye molecules can be better and firmly combined with fiber molecules during the dyeing of the acrylic fibers, so that the dyeing is promoted to be clearer and brighter, thereby reducing color difference, avoiding color spots and strip defects, and improving the fastness to light, dry and wet rubbing.

Therefore, the acrylic fiber leveling agent and the preparation method thereof have the following beneficial effects:

(1) does not contain benzalkonium chloride, meets the requirement of environmental protection;

(2) the novel raw materials are adopted for substitution, and a cationic dye acrylic fiber leveling agent which is wide in applicability, good in effect and environment-friendly is prepared by adopting a scientific formula and an advanced manufacturing process, so that the cost can be reduced by 10-15%;

(3) the manufacturing time is short, and 5.0-10.0% of time is saved compared with the traditional process;

(4) the dye has excellent diffusivity and migration, and dye molecules are uniformly combined with fiber molecules during dyeing, so that the color difference is reduced, color spots and strip defects are avoided, the glossiness of the dyeing and the color fastness after dyeing are ensured, and the dyeing strength, the dry-wet rubbing fastness and the light fastness are obviously improved.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a comparison of the acrylic fiber leveling agent of the present invention and a Hainan acrylic fiber leveling agent;

FIG. 2 is a comparison of the acrylic fiber leveling agent of the present invention and the Jiahong acrylic fiber leveling agent;

FIG. 3 is a comparison of the light fastness for three conditions;

FIG. 4 is a test chart of the effect of stripping and color correction of an acrylic fiber leveling agent;

fig. 5 is a comparison of the color shading test for the old VLK and the new VLK.

Detailed Description

The technical solution of the present invention is further illustrated by the following examples.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.

The invention provides an acrylic fiber leveling agent which comprises the following components in percentage by mass: 1.0-2.0% of emulsifier, 3.0-5.0% of fatty amine and derivatives thereof, 1.0-3.0% of fatty alcohols, 5.0-36.0% of pyridine and derivatives thereof, 8.0-48.0% of benzyl compounds and 6.0-82.0% of water.

The emulsifier is one or more of fatty alcohol ethers (AEO3-10), isomeric tridecanol polyoxyethylene ethers (3-9), oleyl alcohol polyoxyethylene ethers (OE), castor oil polyoxyethylene Ethers (EL), sorbitan fatty esters (Span), polyoxyethylene sorbitan stearates (Tween) and glyceryl monostearate.

The fatty alcohol is one or more of glycerol, polyethylene glycol (PEG) and diethylene glycol.

The pyridine and the derivatives thereof are one or more of picoline, ethylpyridine, pure pyridine and the derivatives thereof.

The benzyl compound is one or more of benzyltriethylammonium chloride, benzylammonium chloride and benzyl chloride.

The fatty amine and the derivatives thereof are one or a mixture of two of fatty amine polyoxyethylene ether 10 and fatty amine polyoxyethylene ether 15.

A preparation method of an acrylic fiber leveling agent comprises the following steps:

(1) in a vacuum reaction kettle with a reflux cooler, firstly adding water in a formula into the reaction kettle, starting up and stirring at the stirring speed of 100rpm, then sequentially adding pyridine and derivatives thereof, benzyl compounds, aliphatic amine and derivatives thereof, raising the reaction temperature to 55-60 ℃ from normal temperature, raising the reaction temperature to 75-80 ℃ when the temperature reaches 55-60 ℃, raising the temperature to 5 minutes from 80-110 ℃ after 17-20 minutes, then starting reflux condensate water to control the reaction, automatically raising the temperature to 90-110 ℃, carrying out vacuum heat preservation reaction for 3 hours, and detecting the product quality;

(2) and (2) cooling the product obtained in the step (1) to 50 ℃, adding an emulsifier for reaction for 2 hours, sequentially adding fatty alcohol, mixing for reaction for 1 hour, and standing for later use.

The technical indexes are as follows:

the detection method comprises the following steps: the pH value is determined according to GB/T6368-93.

Solid content: measured according to GB/T13176.2-91.

Appearance: visual inspection was carried out.

Solubility: directly adding the product into water for dissolving.

Example 1

The invention provides an acrylic fiber leveling agent which comprises the following components in percentage by mass: 15.0% of picoline, 28.0% of benzyl ammonium chloride, 91.0% of AEO, 71.0% of isomeric tridecanol polyoxyethylene ether, 155.0% of fatty amine polyoxyethylene ether, 1.0% of glycerol and 49.0% of water.

Example 2

The invention provides an acrylic fiber leveling agent which comprises the following components in percentage by mass: 28.0% of picoline, 35.0% of benzyltriethylammonium chloride, 801.0% of TWeen, 70.5% of isomeric tridecanol polyoxyethylene ether, 153.0% of fatty amine polyoxyethylene ether, 102.0% of fatty amine polyoxyethylene ether, 4002.0% of PEG and 28.5% of water.

Example 3

The invention provides an acrylic fiber leveling agent which comprises the following components in percentage by mass: 26.0% of methylpyridine, 35.0% of benzyltriethylammonium chloride, 71.0% of isomeric tridecanol polyoxyethylene ether, 61.0% of isomeric tridecanol polyoxyethylene ether, 154.5% of fatty amine polyoxyethylene ether, 4002.0% of PEG, and 30.5% of water.

Example 4

The invention provides an acrylic fiber leveling agent which comprises the following components in percentage by mass: 30.0% of pyridine derivative, 40.0% of benzyl ammonium chloride, 801.0% of Span, 61.5% of isomeric tridecanol polyoxyethylene ether, 2.0% of primary amine, 103.0% of fatty amine polyoxyethylene ether, 2002.0% of PEG and 20.5% of water.

Example 5

The invention provides an acrylic fiber leveling agent which comprises the following components in percentage by mass: 18.0% of ethyl pyridine, 25.0% of benzyl ammonium chloride, 801.0% of TWeen, 71.0% of isomeric tridecanol polyoxyethylene ether, 1.0% of primary amine, 154.0% of fatty amine polyoxyethylene ether, 1001.0% of PEG and 49.0% of water.

Final comparison of usage test results:

1. the following conclusions are made according to the dyeing, printing and comparison of a plurality of products:

(1) the dyeing is slowly colored in the dyeing starting stage after the acrylic fiber leveling agent is used for dyeing, so that the dyeing is uniformly combined with fiber molecules and cannot be dyed; the dyeing of dye molecules is fast in the initial stage by using the acrylic fiber leveling agent on the market, so that the dye and fiber molecules are easily and quickly combined, and a series of problems such as color spots and stripes are easily caused in dyeing, and the like, as shown in figures 1 and 2.

Wherein FIG. 1 is a comparison of the acrylic fiber leveling agent of the present invention and a Hainan acrylic fiber leveling agent.

Fiber properties: acrylic fibre

X: dye (cation Yellow GL 33%, Red GRL 33%, blue GRRL 34%)

A: 0.5 percent of X; 2.0% of HAC; PAN 2.0%; 1.5 percent of Haian acrylic fiber leveling agent.

B: 0.5 percent of X; 2.0% of HAC; PAN 2.0%; the acrylic fiber leveling agent of the invention is 1.5 percent.

As a result: the color A of the dyed yarn is much darker than that of the yarn B from 80 ℃ at the same time under the same condition, and the color A of the residual yarn is much lighter than that of the yarn B, which shows that the dyeing is started too fast when the yarn A is dyed than the yarn B, dye molecules cannot be uniformly dispersed into fiber molecules and are deposited on the outer surface or a certain part of the fiber, so that the fiber is easy to dye and has poor uniformity.

FIG. 2 is a comparison of the acrylic fiber leveling agent of the present invention and the Jiahong acrylic fiber leveling agent.

Fiber properties: acrylic fibre

X: dye (cation Yellow GL 33%, Red GRL 33%, blue GRRL 34%)

A: 0.5 percent of X; 2.0% of HAC; PAN 2.0%; 1.5 percent of Jiahong acrylic fiber leveling agent.

B: 0.5 percent of X; 2.0% of HAC; PAN 2.0%; the acrylic fiber leveling agent of the invention is 1.5 percent.

As a result: the color A of the dyed yarn is much darker than that of the yarn B from 80 ℃ at the same time under the same condition, and the color A of the residual yarn is much lighter than that of the yarn B, which shows that the dyeing is started too fast when the yarn A is dyed than the yarn B, dye molecules cannot be uniformly dispersed into fiber molecules and are deposited on the outer surface or a certain part of the fiber, so that the fiber is easy to dye and has poor uniformity.

(2) Dyeing test process flow:

dyeing: weighing 16 acrylic grey yarns or grey cloth 4 g, respectively putting the 16 acrylic grey yarns or grey cloth into 16 dyeing cups containing 100 g of water (the ratio of the yarn or cloth to the water is 1: 25) and 0.02 g (calculated by 0.5% of the yarn or cloth) of cations (Yellow GL 33%, Red GRL 33% and blue GRRL 34%) dye, 0.08 g (calculated by 2% of the yarn or cloth) of glacial acetic acid and 0.08 g (calculated by 2% of the yarn or cloth) of the acrylic dye-resisting agent of the application, making labels, adding 0.06 g (calculated by 1.5% of the yarn or cloth) of the conventional acrylic dye-leveling agent on the market into a cylinder No. A1A2A3A4A5A6A7A8, adding 0.06 g (calculated by 1.5% of the yarn or cloth) of the acrylic dye-leveling agent of the invention into a cylinder No. B1B2B3B4B 6B7B8, simultaneously stirring and heating, taking out the acrylic dye blank yarns or grey cloth when the temperature of A1 and the B1 rises to 80 ℃, respectively adding 1 g of the dye blank yarns and respectively and adding 1; when the temperature of A2 and B2 rises to 90 ℃, the dyed yarns are taken out, 1 g of grey yarns are respectively added to absorb respective residual liquid for comparing colors; when the temperature of A3 and B3 rises to 90 ℃ for 5 minutes, taking out the dyed yarns, and respectively adding 1 g of grey yarns to absorb residual liquid for comparing colors; when the temperature of A4 and B4 rises to 95 ℃, the dyed yarns are taken out, 1 g of grey yarns are respectively added to absorb respective residual liquid for comparing colors; when the temperature of A5 and B5 rises to 95 ℃ for 5 minutes, taking out the dyed yarns, and respectively adding 1 g of grey yarns to absorb respective residual liquid for comparing colors; when the temperature of A6 and B6 rises to 98 ℃, dyed yarns are taken out, 1 g of grey yarns are respectively added to absorb respective residual liquid for comparing colors; when the temperature of A7 and B7 rises to 98 ℃ for 10 minutes, taking out the dyed yarns, and respectively adding 1 g of grey yarns to absorb respective residual liquid for comparing colors; when the temperature of A8 and B8 rises to 98 ℃ for 45 minutes, the dyed yarns are taken out, and 1 g of grey yarn is added respectively to absorb the residual liquid for comparison.

2. The following conclusions are made according to the color fastness printing comparison:

(1) the color fastness of the fiber fabric using the acrylic fiber leveling agent is about 15 percent higher than that of the fiber fabric using the acrylic fiber leveling agent on the current market.

Dyeing test process flow:

firstly, dyeing: weighing 2 4 grams of acrylic fiber green yarns or grey cloth, respectively putting the yarns or grey cloth into 2 dyeing cups containing 100 grams of water (the ratio of the yarn or cloth to the water is 1: 25) and 0.02 gram (calculated by 0.5 percent of the yarn or cloth) of cation (Yellow GL33 percent, Red GRL33 percent and blue GRRL34 percent) dye, 0.08 gram (calculated by 2 percent of the yarn or cloth) of glacial acetic acid and 0.08 gram (calculated by 2 percent of the yarn or cloth) of the acrylic fiber dye-resist agent of the invention, making labels, adding 0.06 gram (calculated by 1.5 percent of the yarn or cloth) of the existing acrylic fiber dye-resist agent in a cylinder A, adding 0.06 gram (calculated by 1.5 percent of the yarn or cloth) of the acrylic fiber dye-resist agent in a cylinder B, simultaneously stirring and heating, carrying out heat preservation dyeing for 45 minutes when the temperature is 98 ℃, and then taking out and drying.

② fastness

Light fastness: light fastness refers to the degree to which a colored fabric changes color under the action of sunlight. The test method can adopt sunlight or a sunlight machine to shine, the fading degree of the sample after shining is compared with that of a standard color sample, and the test method is divided into 8 grades, wherein the 8 grades are the best, and the 1 grade is the worst.

The experimental detection shows that the light fastness of the fabric dyed by the acrylic fiber leveling agent is grade 6, and the light fastness of the fabric dyed by the acrylic fiber leveling agent currently used in the market is grade 5.

A is a sample plate without using an acrylic fiber leveling agent, B is a sample plate of the existing market acrylic fiber leveling agent, and C is a sample plate of the acrylic fiber leveling agent. FIG. 3 is a comparison of the light fastness of the three conditions.

3. And (3) comparison of color correction stripping effects:

compared with the existing acrylic fiber leveling agent in the market, the stripping strength of the acrylic fiber leveling agent is stronger, and the color repairing effect is better. Since the color of the yarn with the color of A number is lighter than that of the yarn with the color of B number after color correction and stripping, the yarn with the color of original color is stripped and decolored more, and the color of the yarn with the color of A number is darker than that of B number after 2 g of blank yarn is subjected to color correction and homogenization, the yarn with the color of A number is decolorized more and absorbed by the blank yarn, as shown in a figure 4, the test picture of the color correction effect of stripping of an acrylic fiber leveling agent is shown, wherein the fiber property; d: dyed yarn; a: after the leveling agent dyed yarns are stripped; b: stripping the dyed yarns of the sea safety leveling agent; A1B 1: dyeing the stripped color of the corresponding blank yarn; A2B 2: after the corresponding upper blank yarn absorbs the corresponding residual liquid.

② stripping and color correction

Putting 5 mass yarns of acrylic fibers, which are dyed in advance (2 g each, 5 mass yarns of acrylic fibers) into a dyeing cup containing 250 g of water (1: 25 by weight of yarn to water) and 0.1 g (1.0% by weight of yarn or cloth) of cation (Yellow GL 33%, Red GRL 33%, blue GRRL 34%) dye, 0.2 g (2% by weight of yarn or cloth) of glacial acetic acid, 0.2 g (2% by weight of yarn or cloth) of the acrylic dye-blocking agent of the invention, 0.15 g (1.5% by weight of yarn or cloth) of the acrylic dye-leveling agent, stirring and heating, keeping the temperature and dyeing for 45 minutes at 98 ℃, then taking out and drying 2 g of each 2 g and 2 mass yarns of the blank yarns, respectively putting into two dyeing cups containing 100 g of water (1: 25 by weight of yarn to water), making a label, adding 0.12 g (3.0% by weight of yarn or cloth) of the existing acrylic dye-leveling agent in a cylinder in the market in a cylinder B cylinder, stirring and heating the invention at the same time, keeping the temperature at 98 ℃ for dyeing for 45 minutes, and then taking out and drying. Then 1 g of grey yarn is added to absorb residual liquid. Fig. 5 is a comparison graph of the color leveling test of the old VLK and the new VLK.

Therefore, the acrylic fiber leveling agent and the preparation method thereof have good diffusivity and migration, so that dye molecules during dyeing are uniformly combined with fiber molecules, the color difference is reduced, the glossiness and color fastness of dyeing are ensured, and the environmental protection requirement is met.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.